Prototype Pollution Vulnerability in n8n Workflow Automation Platform
CVE-2026-42231

9.4CRITICAL

Key Information:

Vendor

N8n-io

Status
N8n
Vendor
CVE Published:
4 May 2026

What is CVE-2026-42231?

n8n is an open-source workflow automation tool that was found to have a vulnerability in the xml2js library used for parsing XML requests. Prior to specific versions, the vulnerability allowed an authenticated user with permissions to exploit the webhook handler by sending a specially crafted XML payload. This would enable prototype pollution, potentially leading to remote code execution through subsequent Git node SSH operations. The issue has been resolved in the newer releases, urging users to update to versions 1.123.32, 2.17.4, or 2.18.1 to protect their systems.

Affected Version(s)

n8n < 1.123.32 < 1.123.32

n8n >= 2.17.0, < 2.17.4 < 2.17.0, 2.17.4

n8n >= 2.18.0, < 2.18.1 < 2.18.0, 2.18.1

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-q5...
x_refsource_CONFIRM

CVSS V4

Score:
9.4
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.